By what factor did the voltage increase when using the longer blades? *
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By what factor did the RADIUS increase when using the longer blades? *
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By what factor did the SWEPT AREA increase when using the longer blades? *
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If the cost of blades is proportional to their length (2 meter blades cost 2X as much as a 1 meter blades) is there any advantage to using the longer blades? *